RAH build facing delays, says union

A union says construction work is about six months behind schedule on the new Royal Adelaide Hospital.

The CFMEU says it represents about 300 workers on the hospital project, which is due for completion by 2016.

CFMEU branch secretary Aaron Cartledge said there had been delays and management problems.

He said it would be a struggle to finish the job by the due date.

"The greater part of that is because of the contamination of the soil that set the project back early in the piece, but they've still struggled to overcome a few design issues and a few problems that they've got that way," he said.

Health Minister Jack Snelling said he was not aware of any delays.

"I do know from the consortium that they haven't come to us expressing any concerns about the delivery of the project and seeking any extension," he said.